DC vlogdefine params (#2)

* added vlogdefine support for dc.

* Added missing return.

* Generate string and not list of string characters.

* merge defines in one otherwise overwritten by last define.

* merge defines in one otherwise overwritten by last define.

* Code cleaning.

edalize/design_compiler.py

@@ -111,9 +111,9 @@ def make_list(opt):
 
     def src_file_filter(self, f):
         file_types = {
-            'verilogSource'       : 'analyze -format verilog -work work',
-            'systemVerilogSource' : 'analyze -format sverilog -work work',
-            'vhdlSource'          : 'analyze -format vhdl -work work',
+            'verilogSource'       : 'analyze -format verilog',
+            'systemVerilogSource' : 'analyze -format sverilog',
+            'vhdlSource'          : 'analyze -format vhdl',
             # 'xci'                 : 'read_ip',
             # 'xdc'                 : 'read_xdc',
             # 'tclSource'           : 'source',
@@ -122,7 +122,20 @@ def src_file_filter(self, f):
         }
         _file_type = f.file_type.split('-')[0]
         if _file_type in file_types:
-            return file_types[_file_type] + ' ' + f.name
+            cmd = ""
+            cmd += file_types[_file_type] + ' '
+
+            cmd_define = ""
+            if self.vlogdefine.items() != {}:
+                cmd_define = "-define {"
+                for k, v in self.vlogdefine.items():
+                    # SKip reddefinition of SYNTHESIS which is a reserved macro in IEEE Verilog synthesizable subset
+                    if k != 'SYNTHESIS':
+                        cmd_define += " {}={}".format(k, self._param_value_str(v))
+                cmd_define += " }"
+
+            cmd += cmd_define + ' ' + '-work work ' + f.name
+            return cmd
 
         if _file_type == 'user':
             return ''